Long exposure slow door skill lecture

Answer 1

Long exposure slow door photography is a creative and artistic shooting technique. Here are some key points about the long exposure slow door technique:

* * 1. The suitable subject and scene **
1. * * Flowing Water **
- When shooting flowing water, it is recommended to choose early morning or dusk. At this time, there were many layers of light and shadow. The flowing water reflected the light and presented a different style. You can use the nd lens to avoid overexposing. In darker environments such as dark canyons, a nd 32 or nd 64 may be sufficient; in brighter environments, a nd 1000 or nd 2000 may be needed to achieve a longer exposure.
2. * * Train tracks **
- Car tracks were a common theme in the city's night scene. The color, number, and shape of the tracks were closely related to the volume of traffic and shutter speed. It was actually a kind of light and shadow doodling, using long exposure to record the moving trajectory of the car lights. The speed of the shutter and the difference in the volume of traffic would cause the thickness of the tracks to change.
3. * * Weaken the crowd (Passersby in a hurry)**
- The scene could be chosen to be a place where people were concentrated. It was best to choose a place where the flow of people was regular and moved in the depth direction. The exposure time was generally between 1/15 and 1 second. If the exposure time was too long, the clarity of the crowd would decrease. If it was too short, there would be no smear effect. It had to be set according to the amount of people around and the speed of walking. They could also use the trap method to shoot. The focus of different scenes was different. For example, they could shoot the movement of passers-by walking and stopping in front of the window.
4. * * creative light painting **
- Using light painting as a creative method, using the camera's long exposure mode to capture the moving trajectory of the light source to create patterns. It was often used for night scenery and starry sky photography.

* * 2. Pre-shooting preparation and settings **
1. * * Equipment preparation **
- In addition to the camera and lens, a tripod and backup battery were necessary. A stable tripod was a prerequisite for taking high-quality long exposure photos. The shutter release could increase the efficiency of shooting. If not, it could also be replaced by the selfie/countdown function.
2. * * camera settings **
- * * Mode selection **: It is recommended to use the manual mode (M-Mode). This way, you can completely control the aperture, shutter, and USB settings.
- * * Focus Technique **: If the shooting position has been set, do not use autofocus, especially at night or in dark environments. You can first use autofocus to focus on the light-emitting area that is easy to focus on (the distance must be the same), then set it to manual focus (TF), and then avoid moving the camera or the focus ring.
- * * Aperture setting **: For light painting photography, in order to prevent the image from being overexposed, the lens is generally used in a small aperture state. Beginners usually use F18 aperture, unless the environment light is strong or the exposure time is too long, then use the minimum aperture F22. You can also add an nd filter in front of the camera to extend the exposure time.
- * * Light sensitivity control **: Try to use the lowest light sensitivity of the camera as much as possible, because too high light sensitivity will speed up the exposure time, easily causing the image to be overexposed and increase noise.
- * * White balance setting **: To ensure that the image color is normal, it is recommended to use custom white balance to measure the color temperature of the surrounding light before shooting. If you are worried about the color difference caused by the color change of the light source after the light painting, it is best to use the raw format for post-adjustment.

3. * * External environment considerations **
- Pay attention to the weather and time. Long exposure was suitable for taking landscape photos when there were clouds or sunrise and sunset (avoid cloudless and sunny days, because it was easy to get overexposed). Car tracks and star tracks were suitable for shooting at night. If possible, observe the terrain of the target in advance so that you can better grasp the timing and composition of the shot.

* * 3. Special Skills and Points to Take Note of **
1. * * Slow door shaking technique (suitable for shooting high-speed moving objects)**
- Choose Shutter priority (Tv Mode) to shoot. You can choose the shutter speed according to the speed of the main body. You can start from 1/30 to 1/60 seconds. The main point of the action was to stabilize the upper body movement, keep both feet in place, twist the body in the direction and angle of the object in advance, then twist the upper body at a constant speed, press the shutter after entering the appropriate position. He had to turn on the AI Servo-function to achieve automatic tracking focus, and turn on the continuous shooting function to increase the success rate of shooting.
2. * * Slow door combined with flash and curtain synchronization technique **
- It can be used to make the front figure clear when shooting the car track, and the back scene is the moving car track, or to make the front clear when shooting the crowd and the background has the effect of slow door.
3. * * Capture and check the Histogram **
- After shooting, you should refer to the Histogram, especially for long exposure photos during the day to avoid overexposed or underexposed situations.